Michelangelo Code: Did Michelangelo Hide Secret Codes in the Sistine Chapel?

According to a new book by Rabbi Benjamin Blech, a professor of Talmud at Yeshiva University in New York, and Vatican tour guide Roy Doliner, Michelangelo hid a secret code in the frescoes of the Sistine Chapel:

The ceiling of the Sistine Chapel, which the renaissance artist worked on for four years in the early 16th century, is actually a "bridge" between the Roman Catholic Church and the Jewish faith, according to The Sistine Secrets: Unlocking the Codes in Michelangelo’s Defiant Masterpiece.

For example, the book states, the figures of David and Goliath form the shape of the letter gimel, which symbolises g’vurah, or strength, in the mystical Kabbalah tradition.